Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7404ba193e48207…

MALICIOUS

PDF

62.5 KB Created: 2021-06-10 04:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31223731127168d018213280a7c97929 SHA-1: 99062ff6b3eab1cb86386e50d31d7026aa5f115d SHA-256: b7404ba193e4820738384585943e80a859d981aefd0680b56ab658af02834a96
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to directing users to malicious content or further exploitation. No scripts were extracted, but the structure and URL patterns are indicative of a link farm used for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8266

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://irlanc.ru/uplcv?utm_term=star+wars+d20+saga+edition+pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a06975da817---lusowivis.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6e4532db5---gojizagudotepopixajuveb.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/fe69081f4985c2bb04cc6bb4b40953be/loboben.pdf
    • https://anfauglir.com/images/file/34665683913.pdf
    • https://armagedonspedycja.pl/files/file/bijatedetejofewevefop.pdf
    • http://www.vljainandco.com/userfiles/files/90311711954.pdf
    • http://broadviewlibrary.org/uploaded_bvlib/file/ragoxirolumevisanuxoza.pdf
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/alnomiduc34lu6vp1rbdk5esjh/3166357433.pdf
    • https://addsfly.com/userfiles/file/rejutifikode.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/3068dc299767958e9bfee6a51551bcf6/banid.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a96167f1236---85241416891.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/7c4f129fee23336f76621671ab59dee5/zifodit.pdf
    • http://aj-logistics.com/stock/userfiles/file/22905685780.pdf
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/piwesofukiromolugul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb8a.bin
c4a0fc34e80c161744aebaca25938966d5a71d7edb7d0a1a68959978db9829fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 5648 bytes

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